Results 351 to 360 of about 106,252 (402)

Synthesis of 2,4,5-trisubstituted imidazoles over reusable CoFe2O4 nanoparticles: an efficient and green sonochemical process

, 2016
Numerous reports of the synthesis of 2,4,5-trisubstituted imidazoles demonstrate their significance as biologically important molecules. Here we carried out their fast and efficient one-step green sonochemical synthesis through condensation of aldehyde ...
Esmaiel Eidi, M. Z. Kassaee, Zahra Nasresfahani   +2 more
semanticscholar   +1 more source

Formaldehyde and Acetaldehyde Increase Aqueous-Phase Production of Imidazoles in Methylglyoxal/Amine Mixtures: Quantifying a Secondary Organic Aerosol Formation Mechanism

, 2017
Formaldehyde and acetaldehyde are commonly found in cloud droplets because of reversible partitioning and hydration reactions. An SOA formation pathway was recently identified in which these common aldehydes are irreversibly incorporated into imidazole ...
Alyssa A. Rodriguez, A. D. Loera, Michelle H. Powelson, M. M. Galloway, D. Haan   +4 more
semanticscholar   +1 more source

A Facile FeCl3/I2-Catalyzed Aerobic Oxidative Coupling Reaction: Synthesis of Tetrasubstituted Imidazoles from Amidines and Chalcones.

Organic Letters, 2015
A facile and efficient route for the synthesis of tetrasubstituted imidazoles from amidines and chalcones via FeCl3/I2-catalyzed aerobic oxidative coupling has been developed.
Yuelu Zhu, Cheng Li, Jidong Zhang, Mengyao She, Wei Sun, Kerou Wan, Yaqi Wang, B. Yin, Ping Liu, Jianli Li   +9 more
semanticscholar   +1 more source

Photocatalytic coupling of amines to imidazoles using a Mo–ZnIn2S4 catalyst

, 2017
Substituted imidazoles are traditionally synthesized by co-condensation of multiple feedstocks. Herein, we report a new route for the synthesis of substituted imidazoles via photocyclization of readily available amines at room temperature.
Min Wang, L. Lihua, Jianmin Lu, Nengchao Luo, Zhang Xiaochen, Feng Wang   +5 more
semanticscholar   +1 more source

Condensation of mononucleotides by imidazole

Journal of Molecular Evolution, 1971
The condensation of thymidine-5′-monophosphate was carried out in the presence of imidazole in aqueous solutions at neutral pH. Formation of oligo-deoxyribonucleotides up to four units was observed.
J. D. Ibanez, A. P. Kimball, J. Oró
openaire   +3 more sources

New complexes of copper cinnamates and imidazole or substituted imidazole

Thermochimica Acta, 1993
Abstract We have prepared five new organo-metallic complexes of imidazoles and a dicarboxylate, copper cinnamate, which may be considered as extremely simple models of the active centres in most biocatalysts. The thermal behaviour of the complexes was studied. Using ESR and diffuse reflectance spectra, monomeric or dimeric species were detected.
A. Busnot, J.F. Hemidy, J.F. Le Querler, F. Busnot   +3 more
openaire   +2 more sources

Graphene oxide–chitosan bionanocomposite: a highly efficient nanocatalyst for the one-pot three-component synthesis of trisubstituted imidazoles under solvent-free conditions

, 2015
In the present work, a green, rapid, convenient and eco-friendly method for the synthesis of 2,4,5-trisubstituted imidazoles is described. In this method, we used 1,2-diketone or α-hydroxy ketone, an aldehyde and ammonium acetate in the presence of ...
A. Maleki, R. Paydar
semanticscholar   +1 more source

ChemInform Abstract: Superelectrophilic Chemistry of Imidazoles.

ChemInform, 2009
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Robert M. Gallo, Douglas A. Klumpp, Matthew Sheets, Matthew P. Abbott, Ang Li, Adam A. Mitton, Edward A. Bower, Andrew R. Weigel   +7 more
openaire   +3 more sources

Structure of imidazole methemoglobin

Journal of Molecular Biology, 1981
Abstract Crystals of horse methemoglobin shatter when soaked in crystallization buffer containing high concentrations of imidazole. By using less than saturating concentrations of imidazole, a stable imidazole derivative of crystalline methemoglobin was prepared and analyzed by X-ray difference Fourier techniques.
Jeffrey A. Bell, Zbigniew R. Korszun, Keith Moffat   +2 more
openaire   +3 more sources

I₂-catalyzed synthesis of substituted imidazoles from vinyl azides and benzylamines.

Chemical Communications, 2015
A novel and efficient I2-catalyzed oxidative tandem cyclization of simple vinyl azides and benzylamines has been developed for the synthesis of substituted imidazoles.
L. Xiang, Yan-Ning Niu, Xiaobo Pang, Xiaodong Yang, Rulong Yan   +4 more
semanticscholar   +1 more source